2a73

Human Complement Component C3

Method: X-RAY DIFFRACTION

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1. 蛋白身份与相关结构 Protein Identity & Related Structures

Complement C3

物种未注明

当前结构中的状态

Assembly	物理组成	蛋白状态	分子拷贝数	共同组分	数据核对
1	其他组合	同源多聚体	蛋白 2 其他聚合物 2	2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 ;alpha-D-mannopyranose-(1-3)-[beta-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose ; × 1	与蛋白数一致

数据库中的同蛋白其他状态

查看构建体与数据证据

UniProt名称	CO3_HUMAN
Isoform	—
PDB实体	1, 2
链与序列区间	作者链 A； PDB构建体 1–643； UniProt 23–665 作者链 B； PDB构建体 1–991； UniProt 673–1663

页面优先展示蛋白身份、当前 assembly、共同组分、聚集状态和跨 PDB 结构链接。链映射与序列区间收在“数据证据”中；数据库内部编号、导入时间和 assembly 操作表达式仅用于维护，因此不在读者页面展示。

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2. 结构基本信息 2. Structure Basics

条目编号 entry_id	2a73
沉积日期 deposition_date	2005-07-04
结构标题 title	Human Complement Component C3
关键词 keywords	INTACT THIOESTER, IMMUNE SYSTEM; IMMUNE SYSTEM
实验方法 method	X-RAY DIFFRACTION

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3. Official assembly/model 理论 SAXS Official SAXS Profiles

页面只读取最新 assembly 计算结果。每一条曲线都对应明确的 PDB、official biological assembly 和 coordinate model。

2a73__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

下载该曲线 .dat

2a73__assembly_1__model_1 | I(q)

100 个绘图点；横轴和纵轴均采用对数尺度。

2a73__assembly_1__model_1 | P(r) · Pending

P(r) 将按相同 assembly/model 分别计算和展示。

Rg（Guinier）	43.40 Å
Rg（电子密度）	42.97 Å
总 Rg	43.15 Å
原子数	12860
残基数	1611
排除体积	229670 Å³
最大 q	0.500 Å⁻¹

Assembly	Model	结构单元	聚集说明	状态	CRYSOL	操作
1	1	`2a73__assembly_1__model_1`	dimeric （2）	成功	4.1.3-1-20251215 (887e7ef)	查看下载

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4. 晶体学与实验 4. Crystallography & Experiment

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5. 实体与聚合物信息 Entities & Polymers (4)

实体 1 Entity 1 polymer

描述 description	Complement C3
分子量 formula_weight	71267.2 kDa
来源方法 src_method	nat
拷贝数 entity_count	1

聚合物 Polymer

聚合物类型 type	polypeptide(L)
链编号 strand_id	A
原子数 atom_count	12860

SPMYSIITPNILRLESEETMVLEAHDAQGDVPVTVTVHDFPGKKLVLSSEKTVLTPATNHMGNVTFTIPANREFKSEKGRNKFVTVQATFGTQVVEKVVLVSLQSGYLFIQTDKTIYTPGSTVLYRIFTVNHKLLPVGRTVMVNIENPEGIPVKQDSLSSQNQLGVLPLSWDIPELVNMGQWKIRAYYENSPQQVFSTEFEVKEYVLPSFEVIVEPTEKFYYIYNEKGLEVTITARFLYGKKVEGTAFVIFGIQDGEQRISLPESLKRIPIEDGSGEVVLSRKVLLDGVQNLRAEDLVGKSLYVSATVILHSGSDMVQAERSGIPIVTSPYQIHFTKTPKYFKPGMPFDLMVFVTNPDGSPAYRVPVAVQGEDTVQSLTQGDGVAKLSINTHPSQKPLSITVRTKKQELSEAEQATRTMQALPYSTVGNSNNYLHLSVLRTELRPGETLNVNFLLRMDRAHEAKIRYYTYLIMNKGRLLKAGRQVREPGQDLVVLPLSITTDFIPSFRLVAYYTLIGASGQREVVADSVWVDVKDSCVGSLVVKSGQSEDRQPVPGQQMTLKIEGDHGARVVLVAVDKGVFVLNKKNKLTQSKIWDVVEKADIGCTPGSGKDYAGVFSDAGLTFTSSSGQQTAQRAELQCPQP

实体 2 Entity 2 polymer

描述 description	Complement C3
分子量 formula_weight	113082.8 kDa
来源方法 src_method	nat
拷贝数 entity_count	1

聚合物 Polymer

聚合物类型 type	polypeptide(L)
链编号 strand_id	B

VQLTEKRMDKVGKYPKELRKCCEDGMRENPMRFSCQRRTRFISLGEACKKVFLDCCNYITELRRQHARASHLGLARSNLDEDIIAEENIVSRSEFPESWLWNVEDLKEPPKNGISTKLMNIFLKDSITTWEILAVSMSDKKGICVADPFEVTVMQDFFIDLRLPYSVVRNEQVEIRAVLYNYRQNQELKVRVELLHNPAFCSLATTKRRHQQTVTIPPKSSLSVPYVIVPLKTGLQEVEVKAAVYHHFISDGVRKSLKVVPEGIRMNKTVAVRTLDPERLGREGVQKEDIPPADLSDQVPDTESETRILLQGTPVAQMTEDAVDAERLKHLIVTPSGCGEQNMIGMTPTVIAVHYLDETEQWEKFGLEKRQGALELIKKGYTQQLAFRQPSSAFAAFVKRAPSTWLTAYVVKVFSLAVNLIAIDSQVLCGAVKWLILEKQKPDGVFQEDAPVIHQEMIGGLRNNNEKDMALTAFVLISLQEAKDICEEQVNSLPGSITKAGDFLEANYMNLQRSYTVAIAGYALAQMGRLKGPLLNKFLTTAKDKNRWEDPGKQLYNVEATSYALLALLQLKDFDFVPPVVRWLNEQRYYGGGYGSTQATFMVFQALAQYQKDAPDHQELNLDVSLQLPSRSSKITHRIHWESASLLRSEETKENEGFTVTAEGKGQGTLSVVTMYHAKAKDQLTCNKFDLKVTIKPAPETEKRPQDAKNTMILEICTRYRGDQDATMSILDISMMTGFAPDTDDLKQLANGVDRYISKYELDKAFSDRNTLIIYLDKVSHSEDDCLAFKVHQYFNVELIQPGAVKVYAYYNLEESCTRFYHPEKEDGKLNKLCRDELCRCAEENCFIQKSDDKVTLEERLDKACEPGVDYVYKTRLVKVQLSNDFDEYIMAIEQTIKSGSDEVQVGQQRTFISPIKCREALKLEEKKHYLMWGLSSDFWGEKPNLSYIIGKDTWVEHWPEEDECQDEENQKQCQDLGAFTESMVVFGCPN

实体 3 Entity 3 branched

描述 description	2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
分子量 formula_weight	424.4 kDa
来源方法 src_method	man
拷贝数 entity_count	1

实体 4 Entity 4 branched

描述 description	;alpha-D-mannopyranose-(1-3)-[beta-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose ;
分子量 formula_weight	910.8 kDa
来源方法 src_method	man
拷贝数 entity_count	1

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6. 折叠分类 (SCOP + CATH) 28 domains

SCOP 2.08 (15 domains)

结构域编号 domain_id	d2a73.1
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.1 — Immunoglobulin-like beta-sandwich
超家族 Superfamily superfamily	b.1.29 — Macroglobulin
家族 Family family	b.1.29.7 — Complement C3 MG6-like

结构域编号 domain_id	d2a73a1
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.1 — Immunoglobulin-like beta-sandwich
超家族 Superfamily superfamily	b.1.29 — Macroglobulin
家族 Family family	b.1.29.2 — Complement C3 MG1-like

结构域编号 domain_id	d2a73a2
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.1 — Immunoglobulin-like beta-sandwich
超家族 Superfamily superfamily	b.1.29 — Macroglobulin
家族 Family family	b.1.29.3 — Complement C3 MG2-like

结构域编号 domain_id	d2a73a3
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.1 — Immunoglobulin-like beta-sandwich
超家族 Superfamily superfamily	b.1.29 — Macroglobulin
家族 Family family	b.1.29.4 — Complement C3 MG3-like

结构域编号 domain_id	d2a73a4
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.1 — Immunoglobulin-like beta-sandwich
超家族 Superfamily superfamily	b.1.29 — Macroglobulin
家族 Family family	b.1.29.5 — Complement C3 MG4-like

结构域编号 domain_id	d2a73a5
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.1 — Immunoglobulin-like beta-sandwich
超家族 Superfamily superfamily	b.1.29 — Macroglobulin
家族 Family family	b.1.29.6 — Complement C3 MG5-like

结构域编号 domain_id	d2a73a6
类 Class class	g — Small proteins
折叠类型 Fold fold	g.94 — Complement C3 linker domain-like
超家族 Superfamily superfamily	g.94.1 — Complement C3 linker domain-like
家族 Family family	g.94.1.1 — Complement C3 linker domain-like

结构域编号 domain_id	d2a73b1
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.1 — Immunoglobulin-like beta-sandwich
超家族 Superfamily superfamily	b.1.29 — Macroglobulin
家族 Family family	b.1.29.8 — Complement C3 MG7-like

结构域编号 domain_id	d2a73b2
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.1 — Immunoglobulin-like beta-sandwich
超家族 Superfamily superfamily	b.1.29 — Macroglobulin
家族 Family family	b.1.29.1 — Alpha-macroglobulin receptor domain

结构域编号 domain_id	d2a73b3
类 Class class	a — All alpha proteins
折叠类型 Fold fold	a.50 — Anaphylotoxins (complement system)
超家族 Superfamily superfamily	a.50.1 — Anaphylotoxins (complement system)
家族 Family family	a.50.1.1 — Anaphylotoxins (complement system)

结构域编号 domain_id	d2a73b4
类 Class class	j — Peptides
折叠类型 Fold fold	j.127 — Complement system alpha-prime linker
超家族 Superfamily superfamily	j.127.1 — Complement system alpha-prime linker
家族 Family family	j.127.1.1 — Complement system alpha-prime linker

结构域编号 domain_id	d2a73b5
类 Class class	j — Peptides
折叠类型 Fold fold	j.128 — Complement system anchor region
超家族 Superfamily superfamily	j.128.1 — Complement system anchor region
家族 Family family	j.128.1.1 — Complement system anchor region

结构域编号 domain_id	d2a73b6
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.23 — CUB-like
超家族 Superfamily superfamily	b.23.4 — Complement system CUB domain
家族 Family family	b.23.4.1 — Complement system CUB domain

结构域编号 domain_id	d2a73b7
类 Class class	a — All alpha proteins
折叠类型 Fold fold	a.102 — alpha/alpha toroid
超家族 Superfamily superfamily	a.102.4 — Terpenoid cyclases/Protein prenyltransferases
家族 Family family	a.102.4.4 — Complement components

结构域编号 domain_id	d2a73b8
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.40 — OB-fold
超家族 Superfamily superfamily	b.40.3 — TIMP-like
家族 Family family	b.40.3.3 — Netrin-like domain (NTR/C345C module)

CATH v4.4 (13 domains)

结构域编号 domain_id	2a73A01
类 Class class	2 — Mainly Beta
架构 Architecture architecture	60 — Sandwich
拓扑 Topology topology	40 — Immunoglobulin-like
同源超家族 H-superfamily homologous superfamily	1930 — Macroglobulin (MG2) domain

结构域编号 domain_id	2a73A02
类 Class class	2 — Mainly Beta
架构 Architecture architecture	60 — Sandwich
拓扑 Topology topology	40 — Immunoglobulin-like
同源超家族 H-superfamily homologous superfamily	1930 — Macroglobulin (MG2) domain

结构域编号 domain_id	2a73A03
类 Class class	2 — Mainly Beta
架构 Architecture architecture	60 — Sandwich
拓扑 Topology topology	40 — Immunoglobulin-like
同源超家族 H-superfamily homologous superfamily	1940 —

结构域编号 domain_id	2a73A04
类 Class class	2 — Mainly Beta
架构 Architecture architecture	60 — Sandwich
拓扑 Topology topology	40 — Immunoglobulin-like
同源超家族 H-superfamily homologous superfamily	10 — Immunoglobulins

结构域编号 domain_id	2a73A05
类 Class class	2 — Mainly Beta
架构 Architecture architecture	60 — Sandwich
拓扑 Topology topology	40 — Immunoglobulin-like
同源超家族 H-superfamily homologous superfamily	1930 — Macroglobulin (MG2) domain

结构域编号 domain_id	2a73A06
类 Class class	6 — Special
架构 Architecture architecture	20 — Other non-globular
拓扑 Topology topology	50 — N-terminal domain of TfIIb
同源超家族 H-superfamily homologous superfamily	160 —

结构域编号 domain_id	2a73B01
类 Class class	1 — Mainly Alpha
架构 Architecture architecture	20 — Up-down Bundle
拓扑 Topology topology	91 — Influenza Virus Matrix Protein; Chain A, domain 1
同源超家族 H-superfamily homologous superfamily	20 — Anaphylotoxins (complement system)

结构域编号 domain_id	2a73B02
类 Class class	2 — Mainly Beta
架构 Architecture architecture	20 — Single Sheet
拓扑 Topology topology	130 — S-adenosyl-L-methionine-dependent methyltransferases
同源超家族 H-superfamily homologous superfamily	20 —

结构域编号 domain_id	2a73B03
类 Class class	2 — Mainly Beta
架构 Architecture architecture	60 — Sandwich
拓扑 Topology topology	40 — Immunoglobulin-like
同源超家族 H-superfamily homologous superfamily	10 — Immunoglobulins

结构域编号 domain_id	2a73B04
类 Class class	2 — Mainly Beta
架构 Architecture architecture	60 — Sandwich
拓扑 Topology topology	120 — Jelly Rolls
同源超家族 H-superfamily homologous superfamily	1540 —

结构域编号 domain_id	2a73B05
类 Class class	1 — Mainly Alpha
架构 Architecture architecture	50 — Alpha/alpha barrel
拓扑 Topology topology	10 — Glycosyltransferase
同源超家族 H-superfamily homologous superfamily	20 —

结构域编号 domain_id	2a73B06
类 Class class	2 — Mainly Beta
架构 Architecture architecture	60 — Sandwich
拓扑 Topology topology	40 — Immunoglobulin-like
同源超家族 H-superfamily homologous superfamily	690 — Alpha-macroglobulin, receptor-binding domain

结构域编号 domain_id	2a73B07
类 Class class	2 — Mainly Beta
架构 Architecture architecture	40 — Beta Barrel
拓扑 Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
同源超家族 H-superfamily homologous superfamily	120 —

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晶胞边长 a length_a	116.980 Å
晶胞边长 b length_b	156.260 Å
晶胞边长 c length_c	271.200 Å
晶胞夹角 α angle_alpha	90.00 °
晶胞夹角 β angle_beta	90.00 °
晶胞夹角 γ angle_gamma	90.00 °
晶胞分子数 Z z_pdb	8

空间群 space_group	I 2 2 2
空间群编号 int_tables_number	23
晶系 crystal_system	—

分辨率 resolution	3.300 Å
最低分辨率 resolution_low	40.000 Å
R 因子 r_factor	0.2330
R_work r_work	0.2301
R_free r_free	0.2894

Human Complement Component C3

1. 蛋白身份与相关结构 Protein Identity & Related Structures

Complement C3

当前结构中的状态

数据库中的同蛋白其他状态

2. 结构基本信息 2. Structure Basics

3. Official assembly/model 理论 SAXS Official SAXS Profiles

2a73__assembly_1__model_1

2a73__assembly_1__model_1 | I(q)

2a73__assembly_1__model_1 | P(r) · Pending

4. 晶体学与实验 4. Crystallography & Experiment

晶胞参数 Unit Cell

对称性 Symmetry

精修参数 Refinement

衍射实验 Diffraction

5. 实体与聚合物信息 Entities & Polymers (4)

实体 1 Entity 1 polymer

聚合物 Polymer

实体 2 Entity 2 polymer

聚合物 Polymer

实体 3 Entity 3 branched

实体 4 Entity 4 branched

6. 折叠分类 (SCOP + CATH) 28 domains

SCOP 2.08 (15 domains)

CATH v4.4 (13 domains)

7. 引用文献 (1)

Human Complement Component C3

1. 蛋白身份与相关结构 Protein Identity & Related Structures

Complement C3

当前结构中的状态

数据库中的同蛋白其他状态

单体

同源二聚体

同源四聚体

其他同源多聚体

异源或核酸复合物

2. 结构基本信息 2. Structure Basics

3. Official assembly/model 理论 SAXS Official SAXS Profiles

2a73__assembly_1__model_1

2a73__assembly_1__model_1 | I(q)

2a73__assembly_1__model_1 | P(r) · Pending

4. 晶体学与实验 4. Crystallography & Experiment

晶胞参数 Unit Cell

对称性 Symmetry

精修参数 Refinement

衍射实验 Diffraction

5. 实体与聚合物信息 Entities & Polymers (4)

实体 1 Entity 1 polymer

聚合物 Polymer

实体 2 Entity 2 polymer

聚合物 Polymer

实体 3 Entity 3 branched

实体 4 Entity 4 branched

6. 折叠分类 (SCOP + CATH) 28 domains

SCOP 2.08 (15 domains)

CATH v4.4 (13 domains)

7. 引用文献 (1)